PMID- 36254341 OWN - NLM STAT- PubMed-not-MEDLINE LR - 20221019 IS - 2045-7022 (Print) IS - 2045-7022 (Electronic) IS - 2045-7022 (Linking) VI - 12 IP - 10 DP - 2022 Oct TI - Determining biomarkers for evaluation and diagnosis of hereditary angioedema. PG - e12202 LID - 10.1002/clt2.12202 [doi] LID - e12202 AB - RATIONALE: Kallikrein-bradykinin-forming cascade is known to cause hereditary angioedema (HAE) acute angioedema (AE) attacks. Further research of HAE attacks is needed to explain disease heterogeneity, predict treatment response and identify biomarkers for monitoring HAE attacks. Differential expression of the microvascular endothelial cell-surface receptors for example, g-C1qR, cytokeratin-1, and plasminogen-activator-urokinase-receptor (PLAUR) were hypothesized as biomarkers of AE attacks. METHOD: To understand HAE attacks, the differentially expressed genes (DEGs) in RNAseq and mi-RNAseq data of total RNA extracted from skin biopsies of lesional versus non-lesional skin collected during and between attacks in Type-1 HAE patients (n = 11; F:M = 8:3) were compared. To understand the HAE variants, DEGs in skin biopsies from HAE with normal C1 inhibitor (n = 5, F:M = 5:0), and non-HAE (n = 7; F:M = 3:4) patients were compared. Gene-set enrichment analyses and regulator effects analysis of these DEGs identified biological pathways in HAE attacks and their regulators. RESULTS: PLAUR gene, encoding urokinase-type plasminogen activator (u-PAR), was constitutively over-expressed in HAE-Type-1 versus non-HAE controls suggestive of overactive u-PAR-mediated signaling via binding to Factor-XII. Baseline PLAUR expression was associated with severe AE (p = 0.05). The 18 significant DEGs investigated between baseline and AE attack samples in Type1-HAE were enriched in beta1/beta3-integrin cell surface interactions and IL-6-mediated signaling. Regulator effects analysis suggests a role for IL-1b in HAE flares. AKT2, the mRNA regulated by the differentially-expressed miR-184A, was also associated with HAE attacks. CONCLUSION: Angiopoetin-activated beta1-integrin signaling pathways causing endothelial destabilization, and avid binding of factor XII to u-PAR are possible novel mechanisms for progression of the endothelial kinin-bradykinin-forming cascade in HAE attacks. CI - (c) 2022 The Authors. Clinical and Translational Allergy published by John Wiley & Sons Ltd on behalf of European Academy of Allergy and Clinical Immunology. FAU - Singh, Umesh AU - Singh U AUID- ORCID: 0000-0003-1830-6262 AD - University of Cincinnati College of Medicine Cincinnati Ohio USA. FAU - Bernstein, Jonathan A AU - Bernstein JA AD - University of Cincinnati College of Medicine Cincinnati Ohio USA. LA - eng PT - Journal Article DEP - 20221012 PL - England TA - Clin Transl Allergy JT - Clinical and translational allergy JID - 101576043 PMC - PMC9557132 OTO - NOTNLM OT - HAE attacks OT - HAE with normal C1 inhibitor OT - IL-1b, beta1/beta3-integrin OT - IL-6 OT - PLAUR gene OT - RNAseq OT - biomarkers OT - differentially expressed genes OT - hereditary angioedema OT - heterogeneity OT - immunology OT - immunotherapy OT - kallikrein-bradykinin OT - other COIS- Umesh Singh: Nothing to disclose. Jonathan A. Bernstein: PI, consultant, speaker: Takeda/Shire, CSL Behring, Pharming, Biocyrst; PI, consultant: Biomarin, Kalvista, Ionis; Consultant:; Pharvaris, Astria. EDAT- 2022/10/19 06:00 MHDA- 2022/10/19 06:01 PMCR- 2022/10/12 CRDT- 2022/10/18 01:51 PHST- 2022/04/05 00:00 [received] PHST- 2022/07/31 00:00 [revised] PHST- 2022/08/16 00:00 [accepted] PHST- 2022/10/18 01:51 [entrez] PHST- 2022/10/19 06:00 [pubmed] PHST- 2022/10/19 06:01 [medline] PHST- 2022/10/12 00:00 [pmc-release] AID - CLT212202 [pii] AID - 10.1002/clt2.12202 [doi] PST - epublish SO - Clin Transl Allergy. 2022 Oct 12;12(10):e12202. doi: 10.1002/clt2.12202. eCollection 2022 Oct.